Smoke consuming or preventing furnace



(No Model.) I 5 Sheets-Sheet 1.

J. A. BALDWIN..

SMOKE GNSUMING O R PREVENTING FURNAGE.

No. 470,171. Patented Mar. 8, 189.2.A

BWM:

...1 .......a All .E

5 Sheets-Sheet; 2.

(No Model.)

J. A. BALDWIN. SMOKE coNsUMING on PRBVENTING FURNAGE.

Patented Mar. 8

(No Model.) I. 5 sheets-sheet a.

J. A. BALDWIN. SMOKE GONSUMING 0R PRBVEN'TING PURNAGB. No. 4'70,1'71.-v

Patented Mar.. 8, v1892.

Wines es.'

(N Model.) A5 sheets-sheet 4.

J. A. BALDWIN.

1 SMOKE GONSUMING 0R BREVBNTING PURNAGB. No. 470,171. y Patented Mar. 8,1892.

l NITED STATES -`Internat"r CFFICE.

JUDsoN A. BALDWIN, or vBENTON HAROR', MICHIGAN".

SMOKE coNsUMlNG o'R PREvl-:NTING Fu-RNACE.

, sPEcIFIcA'rIoN forming part of Letters 'Patent No. 470,171, atea March8,1892. Application filed September 7,1891. Serial No. l05,027.l (Nomodel.) l

' To @ZZ whom it mafy concern'.

Be it known that I, vJUDsoN A. BALDWIN, of Benton Harbor, Berriencounty, Michigan, have invented certain new and useful Improvements inSmoke Consuming or Preventing Furnaces, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming a part hereof.

My invention relates to furnaces which are designed for use inconnection. with steamgenerators for power or for steam-heating sysy ofthe various types of steam-generators heretofore devised, and the.circulating -attach-l ments of which can be readily and quickly builtup and disconnected.

A still further object of my invention is lto produce a furnace whichshalll operate as a feed-water heater, and by means ofu Which a constantcirculation of water shall be main.

tained in the generator, the colder water being constantly passedthrough the furnace 'and heated, and as constantly supplied to thegenerator in such hcatedcondition, and the effective capacity of theboiler being thus further increased.

Tothe above purposesmy invention consists in certain peculiar and novelfeatures of construction and arrangement, as hereinafter described andclaimed.

In order that my invention may be fully understood, I will proceed todescribe it with -section of the saine on the line 2 2 of Fig. 3.

Fig. 3 is a vertical longitudinal sectionof the same on the line 3 3 ofFig. 1. Figs. 4., 5, and 55 6'are detached sectional views of certainfealtures of construction, hereinafter described.

Fig. 7 is a view, partly in side elevation and I `partly in verticallongitudinal section, on the Fig. 8 is a transverse vertical section ofthe same on the line 8 8 of Fig. 7.

- n the said drawings, 1 designates the setting of a steam-generator,thesaid setting be- .65 I' ing either of brick-work, masonry, or of anyother suitable or Vpreferred material, and of such form and dimensionsas circumstances may require. In Figs. 1, 2, and 3 I have shown thesetting 1 as inclosing a generator of the 7o i safety type, and moreparticularly of what is known as' the Wharton-Harrison type ofsafety-boilers, thistype of generator consisting of a number of balls orspheres 2, united together by peculiarly-arranged bolts, so as to 75form units, and these units being grouped to form slabs It is to beunderstood, however, that While in the said figures of the drawings Ihave shown my improved furnace as applied to this particular type ofsafety# 8o I boilers and shall describe itas so applied,th`e saidfurnace is equally as well adapted to other types of safetyboilers.

Let 3 designate the fire-chamber, and 4 the ash-pit, of my improvedfurnace, the bottom 85 of said ash-pit being formed by a horizontalplate or bottom piece 5, which is of any-suit-Y able or preferrednon-combustible material, and which extends from front to rear of theboiler-setting. 6 designates-the bridge-wall 9o of the furnace, the saidWall being also of brick-work, masonry, or other` suitablenoncombustible material and extending vertically and also from side tosideof the setting 1. The upper front portion 7 of this bridge-wall 95is preferably inclined forwardly and upwardly, as is best shown in Fig.3. In the lower part of this bridge-wall is formed a horizontalair-supply channel 8, which extends from end to end of the bridge-walland which opens out through the corresponding sides of the setting 1.From this main air-supply channel 8 extend a number of vertical branchchannels 9, which are also formed in the bridge-wall and roo which attheir upper ends communicate with the inner or rear ends ofacorresponding number of horizontal branch channels 10. These branchchannels are formed in the upper part of the bridge-wall 6 and open attheir front ends out of the upper front portion 7 of the bridge-wall.Through the upper part of the bridge-wall 6 extends a steam-supply pipe11, which extends horizontally from end to end of the bridge-wall andwhich is suitably connected at one end to the steam-space of thegenerator. This pipe 11 extends immediately beneath the upper channels10 before described, and is provided at intervals with jet'nozzles 12,each of which extends obliquely.l

and the upper end of each of which opens outwardly and -forwardly intothe front part of each channel 10. Immediately in front of thebridge-wall 6 is a second or auxiliary bridge- Wall13, whichis of lessheight than the main bridge-wall and which extends from one side of thesetting 1 to the other or opposite side of the same. This wall occupiessuch a distance "from the said bridge-wall 6 as to leave a transversespace or chamber 14 between the front side of the main bridge-wall 6 andthe rear side ofthe auxiliary bridge-wall 13. This auxiliarybridge-wall13 is of fire-brick or anyother suitable refractory material, so as tobe indestructible by heat, and said auxiliary wall is also ofconsiderable thickness for a purpose to be presently explained. In thedrawings the bridge- Wall 13 is shown as of ,somewhat less thicknessthan the main bridge-wall 6, and said auxiliary wall is formed with anumber of openings or channels 15,the front ends 4of which communicatewith the interior of the ash-pit4, while their rear ends communicatewith the space 14. Owing to the thick-V ness of the auxiliarybridge-wall 13, its openings or channels l5 are elongated horizontally,and are of such length as to operate as rctorts for the products ofcombustion, as hereinafter explained.

16 designates a drum, which is supported upon a suitable shelf or ledge17 back of the bridge-wall 6, and which extends horizon tally across thesetting 1 from side to side of the same. This drum 16 is suitablyconnected with the adjacent units or balls 2, and is also provided witha number of outletpipes 18, which extend forwardly'from said drum. Threeof these outlet-pipes 18 are shown; but it is obvious that a greaterorless number of said pipes may be employed, if desired. The front endsof these outlet-pipes 1S are connected to a second drum 19, which 4alsoextends horizontally across the interior of the setting l' back of thebridge-wall 6, and which .is provided at each end with an inlet-pipe 2Ofoi-'the admission of cold water from a pump or other feeding appliance.-To the under side of this drum 19 are connected the upper ends of anumber of pipes 21, which extend vertically back of the bridge-wall 6and the lower ends of which are connected by ot the same.

Asired number of pipes 32.

bends 22 and coupling 23 to the rear ends of a number vof pipes 24. Thepeculiar construction of the couplings 23 will be hereinafter described;but at present itwill sufce to say that the pipes 24 extend obliquelyforward and upward through thebridgeswall 6 and the dividing-wall 13,and at their front ends are connected to extensions 25atthe lower partor under side of athird drum 26. This drum 26 is composed ot' a numberof separate and independent short cylindrical sections 27,each of whichis formed on its underside with one of the extensions 25, to which thefront ends of the pipes 24 are connected. Each of the sections 27 isprovided on its front side with a lug 23,- the said lugs resting on theupper side of a ledge 29, which exten ds horizontally along the innerside of the front wall of the casing 1 from side to side thereof. To theinner or rear side of each of the sections 27 is connected the front endof a pipe 30, there being thus any number of said pipes correspondingwith-the number of the sections 27. Thesepipes 30 constitute thewater-bars of the furnace-grate and extend obliquely rearward and upwardabove the ash-pit 4 and pipes 24. At their rear ends these Water-barsare connected to the front side of a drum 3l,

. which ,rests uponthe top of the dividing-wall 13 and which extendsthus horizontally across the interior of the casing 1 from side to sideThis drum 31 is of elongated integral cylindrical form, (as also are thedrums 16 and 19. before described,)- and to its upper side are connectedthe lower ends of any de- These pipes 32 extend obliquely upward andforward, as is best shown in Fig. 3, and to their upper ends ,areconnected la corresponding number of bends or elbows 33, to which latterare also connected the lower ends of acorresponding num ber of pipes 34.These pipes 34 are of approximately J form, their lower portionsextendingobliquely upward and forward at a slight angle from thehorizontal and their upper portions extending also obliquely upward andforward at a slight forward. angle from the perpendicular. The saidpipes 32 and 34 thus form the top of the lire-chamber 3, and the upperends of the pipes 34 are connected to extensions 35, which project fromthe front side of a drum 36. This drum 36 is of continuous cylindricalform, like the drums 16, 19, and 31, andsaid drum 36 extendshorizontally within the interior of the casing l from side to sidethereof, said drum being also connected to the front units or balls ot'the generator at a point considerably above the point of connection ofvthe drum 16 with the generator.

Upon the upper parts of the pipes 32 and 34 is laid a course or lining37 ofvrebricks or other suitable refractory material,

which thus completely closes the top of the IIO -forxned in one side ofthe setting land which communicates with the interior of `thetirechamber 3 through a suitable number of -openings 40. The quantity ofair entering through the channel 8 in the bridge-wall 6 and into thechannels 38 in the sides of the setting 1 is regulated, as desired, bymeans of two slides or dampers 40 and 41, which cover the outer ends ofthe channels 8 and 38, respectively. There are, as shown, two of theseslides or dampers at each side of the setting and each pair of saidslides or dampers is carried by the rear end of an operating-bar 42,which extends horizontally along the side of the setting and the frontendsof which project at the front of the setting. These dampers aresupported in position by hooked lugs 43, which rest uponsupporting-brackets 4 4 at the sides of the setting and allow Atherequired movements of the slides -or dampers.

I have thus described the construction and .arrangement of my improvedfurnace as applied to a safetyboiler,and before describing certaindetails of construction which a're applicable to all forms of thefurnace I will describe the said furnace as applied to a cylindricalboiler, this description relating to the structure shown in Figs. 7 and8. In these figures 1 designates the setting; 3 and 4, the fire-chamberand the ash-pit, respectively; 5, the bottom of theash-pit;6,thebridge-wall having the forwardly and upwardly inclined upperportion 7; 8', the air-inlet channel in the bridge-wall, 'and 9 and 10the branch inletchannelsof the bridge-wall. 11 designates thesteam-supply pipe, and 12 the Lsteamjet nozzle. 13 designates thedividing-wall, which is separated from the bridge-wall 6 by lthe space14 and which is provided with the lopenings 15, and 40 designate theair-inlet openingsfrom the channels 38. 42 designates the operating-barfor the slides or dampers, 43 the supporting-lugs of the same, and 44the supporting-brackets for said lugs. These parts are designated by thesame numerals as those which designate corresponding parts 1n thepreceding. figures, and said parts are in all respects like saidcorresponding parts 1nA respect to form, material, and locatlon. In thisinstance, however, a cylindrical generator 44, of the usual or anypreferred type, vis shown as located within the setting 1, the front endof said generator projecting over the upper v part of the fire-chamber3. In this instance the drum 16 isdispensed with and a .connection ismade with the lower part of the generator 44 bya pipe 45, a bend 46being con! nected to the rear end of said pipe and establishingcommunication between the rear end of the pipe and the water-space -ofthe. generbend 47, which communicates with the upper part of a drum 19.This druml corresponds in construction and location with the drum 19,before described, and is provided at its ends with water-inlet .pipes20,'as before.- From the under side of this drum 19 lead outlet-pipes21, corresponding to the pipes 2l, previously described, and which, asbefore, ex-

tend vertically downward behind the bridgewall. The lower ends of thesepipes are con? nected by bends 22 and couplings 23 (which are to behereinafter more fullydescribed) to -the rear ends 0f the pipes 24, asbefore, and

these pipes also extend obliquely forward and upward through thebridge-wall and dividingwali and also through. the ash-pit 4 in likemanner as has already been described. The, front ends of these pipes 24are connected to tions of the drum 26, and said drum-sections aresupported by lugs 28, which rest upon the ledge 29, asprevionslyexplained. To the rear sides of the sections'of drum 26 are connectedextensions 25 at the under sides of the secthe front ends of thewater-bars 30, which extend obliquely upward and rearward iny the areconnected to the drum 31, said drum rest- FOO 4re-chz'tmber, and therear ends of which ing, as before, onthe top of the dividing-wall ator44 at points above the point of connecy tion of the pipe 45 with saidgenerator. In

this instance the drum 3,6, before described,

is dispensed with and the top of the fire-chamber is formed by the frontend of the generator. In order to insure the required downdraft throughthe grate, a wall 62, of fire-brick, masonry, or other refractorymaterial, is interposed between the pipes 48 and the top of the drum31a-nd the under side of the generator 44, said Wall serving,r the samepurpose as the course or lining 37 before described.

In Fig. 4 I have shown the construction of the couplings 23, whichconnect the lower endsof the pipes 21 with the rear ends of the pipes24, and I will now proceed to describe the bend is also formed with anexternal flange 52, through which are inserted any desired number ofbolts 53, the said bolts extending also through the external flange 54of a gland 55, which enters the front end of the bend, and nuts 56 beingalso screwed upon the front ends of the bolts 53 to retain the parts inposition. A gasket 57, of any suitable material, is interposed betweenthe frontor'outer side of the ring 51 and the rear or inner end of thegland 55, and the compression of this gasket, when the parts areproperly connected, insures a perfectlytight joint ,for the coupling.rlhe opposite ends of the pipes 24 are also externally screwthreaded,the pitch of these front screwthreads being opposite from that of thescrewthreads at the rear ends of the said pipes, and the said front endsof the pipes are screwed into the extensions 25, before referred to.Thus it will be seen that the front ends of the pipes are first screwedinto the extensions 25, and the rings 51 are then screwed upon the rearends of the pipes to such an extent as to bring the inner or rear sidesot the rings snugly against the shoulders 50, when the parts areassembled. Before the rings are screwed upon the pipes 24 the glands andgaskets are placed upon said pipes in the order named, and after therings have been properly adjusted upon the pipes the glands are forcedagainst the gaskets by the nuts 56 of the bolts'53, and perfectly-tightY joints are formed, as before stated. The extensions 25 are separatefrom the sections 27 of the drum 26, and are secured thereto by bolts58, which extend longitudinally through the said extensions. Anelongated opening or slot 59 is formed in the base of each' section 27,andv each bolt 58 is first inserted through said slot or opening, sothat its head 60 (see Fig. 6) shall overlie the margins of the slot.Upon the opposite end of the bolt is screwed a rounded or capped nut 61,which presses upon the under side of the extension 25, and thus stronglyconnects the extension to the drum-section. By virtue of thisarrangement expansion and contraction between the extensions 25 and thedrum-sections are allowed, and at the same time all possibility of thebolts being burned out is prevented by the water which surrounds thebolts and by the capped nuts which protect the ends of said bolts. As'before stated, these forms of couplings and connections of the pipes21lwith thev pipes 21 and drums 26 are employedlin both forms of thefurnaces, and the described connection ot the 'extension 25 with thesections 27 of the drum 26 is also employed in connecting theA In both'extensions 35 with the drum 36. forms of the furnace the front wall ofsetting l is provided with an ash pit door 61, and a fire-door62,located immediately above the ash-pit door. In both instances, also,access to the interior of the setting is afforded by means of a door 63,which is located immediately above the tire-door, and in the structureshown in Figs. 7 and 8 access to the interior of the setting is alsoafforded by a pair of doors 64, which are located at the front part ofthe sides of the setting.

l will now proceed to describe the general operation of the furnacesabove described. Referring first to the furnace shown in Figs. l, 2, and3, the fuel is fed upon the waterbars 30, the fire-door being normallyin closed position, and the air for supplying combustion flows throughand is highly heated in the channels 38 and passes through the openingsll() into the fire-chamber 3 and flows thence downward through the fueland thence downward and also rearward through the ash-pit i. Thecurrents in passing downward and rearward through the ash-pit carry olffrom the fuel all of the gases resulting from combustion and also thefinely-divided solid particles or smoke, which also result from thecombustion of the fuel and Which'have heretofore been discharged throughthe stack and wasted. These products of combustion now llow through theopenings of the dividingwall 13, and owing to the fact that this wall isof considerable thickness, as above stated, the products ofcombustionbecome highly heated by the furnace. The products ofcombnstion in passing through the elongated channels or perforations inthis wall are also raised to a very high temperaturein passing throughthe openings, said openings or channels thus serving as retorts for theproducts of combustiomand the latter are so divided up by the saidopenings as to be raised to the highest possible degree of temperature.The products of combustion in this highly-heated condition now flowupward in the space 14 between the bridge-wall and the dividing-wall,and the bridge-wall being also highly heated prevents any lowering oftemperature of the products of combustion. Meanwhile fresh air isflowing `through the channels 8, 1),.and 10 in the bridge-wall andescapes into the upper part of the space 1l and becomes intimatelyintermingled with the products of combustion. At the same time thisincoming air is charged with steam from the jets 12,. and, owing to thehighly-heated condition of the incoming air, products of combustion, andsteam, the instant such elements meet they burst into flame and thesmoke and combustible gases are immediately and totally consumed. Thus`no smoke what-ever escapes 'from the stack and the entire combustiblesubstances of the fuel are consumed within the apparatus. Furthermore,the Water passing through the pipes 2ais heated bythe downdratt in theash-pit from the furnace and also by the updraft in the space 14, andthe water is also further heated in the drum 26l by direct contact ofsaid drum with the fuel. The water is still further heated in thewater-bars 30 by direct contact of the latter with the fuel, and isfurthermore additionally heated in the drum 3l by contact of said drumon ils IOC) IIO

front side with the fuel and on its rear side Wlth the burning productsof combustion in the space 14. In owing upward through the p1pes`32 and34 the water is further heated by the heatl in the fire-chamber 3 abovethe. grate or water bars 30, .while the drum 36 is maintained at a hightemperature by the burning products of combustion flowing from the space14. These burning products of combustion likewise impinge upon the slabsor units ofthe generator proper and thus augmentthe generation of steamin said gener. ator. It Will thus be seen that not only is all `of thecombustible substance of the fuel completely consumed in the apparatus,but that the water flowing out of and-back into the generator issubjected to repeated beatings, so that the maximum heating capacity ofthe fuel is both 'fully developed and effectively applied. Thearrangement of the water-con-v ducting devices is such that a constantand rapid circulation of `water is automatically maintained, the Waterbeing taken from the lower and colder` portion of thegenerator andreturned to an upper' and hotter part of the Same. The operation of thefurnace shown in Figs. 7 and 8 is preciselythat j ust described in allessential particulars and need not, therefore, be described in detail.The air-supply is easily and quickly regulated,as desired,by the dampers40 and 41 in the manner heretofore explained.

From the above description it will be seen that I have provided afurnace which is' applicable to all types of steam-generators, and whichis simple, durable, and inexpensive in construction, and the operationof which is entirely automatic and under perfect control. It will befurthermore seen that every 'particle of combustible matter in the fuelis entirely consumed, so that the full heating capacity of the fuel isdeveloped and fully applied, and all escape of smoke is prevented. Thusthe amount of fuel-consumption is greatly economized and the generatingcapacity of the apparatus is materially increased.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

1. An improved downdraft smoke consum-` ing or preventing furnacecomprising a watergrate, a main bridge-wall located at the rear of saidgrate, and a perforated wall located in front of the bridge-wall Vandseparated from said Wall by a suitablel vertical interval or space forthe passage of the products of combustion, substantially as set forth.

2. An improved downdraft smoke consuming or preventing furnacecomprising a watergrate, a main bridge-walllocated at the rear of saidgrate and provided with air-supply passages, and a perforated walllocated in front of the bridge-wall and separated from the latter by asuitable vertical space for the passage `of products ofcombustion,substantially as set forth.

3. An improved downdraft smoke consuming or prevent-ing furnacecomprising a Watergrate, a main bridge-wall located back of said grateand provided with air-inlet channels and with a steam-supply pipe havingdis` charge-jets located in the front ends of said channels, and aperforated wall located in front of the bridge-wall and separated fromthe latter by ayertical space for thepassage of products of combustion,substantially as set forth.

' 4. An improved downdraft smoke consume x -je ts opening at the frontends of said airchannels, and a perforated Wall located in front of thebridge-wall and separated from the latter by a vertical space for thepassing of products of combustion, substantially-as set forth. l

'Y 5. An improved downdra'ft smoke consum-v ing or preventing furnacecomprising a suitable grate, a main bridge-wall located back of saidgrate, and afperforated wall of considerable thickness located in frontof said. `main bridge-wall and separated from the latter by a verticalspace for the passage of products of combustion, the perforation's orchannels of said wall being also of a length corre- IOO spending withthe thickness of the wall, sub- I stantially as set forth.

6. An improved downdraft smoke consuming or preventing furnacecomprising a suitable generator, a water-grate, a main bridge walllocated back of the Water-grate, a perforated wall located in frontofthe bridgewall and separated therefrom by a vertical space for thepassage of products of combus; tion, a drum located back of thebridge-wall and'connected to a lower part of the generator, and a seconddrum, also located back of the bridge-wall and connected to thelirstnamed drum, tubular connections leading from the second-named drumand passing forwardly through theb'ridge-wall and the dividingwall andalso forwardly through the ash-pit, a third drum connected to the frontof the water-grate and to the front ends of the said tubular connectionsand located l.at

Athe front of the fire-chamber, a fourth drum mounted upon the top ofthe perforated wall and connected to the rear of the water-grate, afifth drum connected to -an upper front part of the. generator, andtubular connections forming the top of the tire-chamber and connectingthe last-named drum with the drum upon the perforated wall ofthefurnace, substantially as set forth.

- 7. An improved downdraft smoke consuming or preventing furnacecomprising a suitable generator, a water-grate, a main bridgewalllocated back ofthe water-grate, a perforated wall located in front ofthe bridgewall and separated therefrom by a vertical space for thepassage of product-s of combustion, a drum located back of thebridge-wall and connected to a lower part of the generator, a seconddrum, also located back of the bridge-wall and connected to thefirst-named drum, tubular connections leading from the second-named drumand passing forwardly through the bridge-wall and ash-pit and alsoforwardly through the ash-pit, a third drum connected to the front ofthe water-grate and to the front ends of said tubular connections andlocated at the front of the tire-chamber, a fourth drum mounted upon thetop of the .perforated wall and connected to the rear of thewater-grate, a fifth drum connected to an upper front part of thegenerator, tubular connections forming the top of the fire-chamber andcon nectin g the last-named drum with the drum upon the perforated wall,and 'a course or lining of refractory material supported upon saidtubular connections and closing the top of thefire-chamber,substantially as set forth. v

8. An improved downdraft smoke consuming or preventing furnacecomprising a suitable generator, a water-grate, a main bridgewalllocated back of the Water-grate, a perforated Wall located in front ofthe bridge-wall and separated therefrom by a vertical space for thepassage of products of combustion, a drum located at the front of thefire-chamber and connected to the front of the water-grate, a seconddrum mounted upon the perforated wall and connected to the back of thewatergrate and also communicating with an upper front part of thegenerate', a drum located back of the bridge-wall and communicating witha lower rear part of the generator, and tubular connections between thelatter drum and the drum at the front of the tire-chamber, substantiallyas set forth.

9. An improved downdraft smoke consuming or preventing furnacecomprising a watergrate composed of anumber of tubular sections, awater-supply drum composed of a corresponding number of separate hollowsections, each connected to one of the watergrate sections, and a numberof water-supply tubes leading from the generator and connected each toone of said supply-drum sections, substantially as set forth.

10. An improved downdraft smoke consuming or preventing furnacecomprising a tubular water-grate, a sectional water-supply drumconnected to said grate, a number of watersupply tubes connected eachtoone of the supply-sections, a number of supply-tubes.

connected to the generator, a corresponding number of couplings eachconnecting the ing or setting having air-inlet openings located abovethe grate, a drum having'a separate extensioma bolt extending through aslot or opening in the drum and through the extension, a closed orcapped nut screwed upon the threaded endof the bolt, a number of tubularwater-grate bars connected to the drum and located below the air-inletopenings, and a number of water-inlet pipes lo-l cated below the tubulargrate-bars and connectd to the drum-extensions,` substantially as setforth.

l2. An improved downdraft smoke consuming or preventing furnacecomprisinga watergrate, a main bridge-Wall located back of said grate, anumber of supply-tubes connected to said grate and passing through thebridgewall, and a supply-drum located back of the bridge-wall andconnected to the generator and to the supply-tubes and also providedwith inlet-pipes for water, substantially as set forth.

ln testimony whereof I affix my signature in presence of two witnesses.y

JUDSON A. BALDWVIN.

lFifitn esses:

il. li). PRICE, JNO. il. CoNDRoN.

7o ing or preventing furnace comprising a cast

